I'm curious if there's a way to deactivate the feature/behavior in Mac Mail (Sierra) where mail is automatically marked as read when clicked (I want it to remain unread until I click otherwise). I know that I can use the "Classic View" to remove the preview feature, but that doesn't accomplish what I'm aiming for (I want the preview to remain active). And I know there used to be a plugin called TruePreview which offered this feature, but it's no longer available. Any ideas?


1 Answer 1


"Mail Act-On" by SmallCubed has a feature to "Do not mark message as read". It currently costs $30 and that is a lot if that is the only feature you plan to use (it's main purpose is to help you create advanced mail processing rules). I have used it in the past and it worked well (currently using Outlook).

  • +1 for this, I've used it for years and it's a life saver. I really don't want my messages getting marked as read just because they've been selected (sometimes automatically) in the preview list!
    – Carlos P
    Oct 12, 2018 at 19:49
  • The cost of that is now ... $60
    – Dave
    Dec 10, 2018 at 22:38
  • 1
    It is crazy to pay this money for such simple functionality.
    – Dr_Zaszuś
    Jul 18, 2019 at 20:44

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